Environmental drivers and phylogenetic constraints of growth phenologies across a large set of herbaceous species

1. Because perennial herbs of temperate climates develop their aboveground parts every year anew, their success critically depends on the timing and speed of this growth (growth phenology). These parameters can play a role in species coexistence and may differ along environmental gradients. Still, we know little about them, as most phenological data come from observations of flowering and to a lesser degree leafing onset.
2. We collected data on growth phenology of about 400 perennial herbs in a botanical garden to make the results independent of local differences in climatic drivers as much as possible. Using these data, we determined species-specific parameters of Day of peak growth, Day of maturity, and two types of growth rates associated with the change in plant size. Environmental conditions in which these species occur in the field were assessed using Ellenberg indicator values, which express species' optima along gradients of moisture, nutrients and temperature.
3. Both timin...

1. 温带气候下的多年生草本植物每年都会重新萌生地上部分，其种群存续关键取决于该生长过程的时序与速率（生长物候，growth phenology）。此类参数可对物种共存产生影响，且会随环境梯度发生分异。但目前学界对其仍知之甚少，这是因为绝大多数物候数据均来自开花期观测，仅有少量数据针对展叶始期。
2. 为尽可能使研究结果不受气候驱动因子本地差异的影响，本研究于某植物园中收集了约400种多年生草本植物的生长物候数据。基于这批数据，我们确定了各物种的生长峰值日、成熟日，以及两种与植株体量变化相关的生长速率等物种特异性参数。本研究采用埃伦伯格指示值（Ellenberg indicator values）来评估这些物种在野外分布的环境条件，该指标可表征物种在水分、养分与温度梯度上的适宜阈值。
3. 二者的时序……